LX1555IM

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LX1555IM is a DC-DC switching controller from NXP Semiconductors. It belongs to a family of products known as PMIC (Power Management Integrated Circuits), and, more precisely, to the Voltage Regulators and DC-DC Switching Controllers category. It is an integrated solution that delivers the flexibility, performance, and reliability required for today’s most demanding, power-sensitive applications.

LX1555IM is designed to deliver a stable source of power at several different output voltages. For instance, it can work with an input voltage of 5V and provide output voltages at 5V, 2.5V, 1.2V, 1.8V, 3.3V, and 0.9V. Such a versatility allows it to be used in varied applications requiring tight regulation. The LX1555IM is particularly useful for powering low voltage and high current applications, such as radio frequency (RF) and mobile baseband circuitry, as well as ASICs, DSPs, microprocessor and FPGAs.

The DC-DC switching module of the LX1555IM comprises two P-MOSFETs, one NMOSFET and an LDO regulator. It is designed to provide high-efficiency operation, even when the output voltage is adjusted. The P-MOSFET operates in CCM (Continuous Conduction Mode) or DCM (Discontinuous Conduction Mode) at any given load conditions to provide optimized efficiency. Additionally, the integrated LDO regulator is capable of delivering a high output current for powering the load.

The LX1555IM is also fitted with several features that ensure safety and protection from over-voltage and under-voltage. It has an adjustable Over-Voltage Protection (OVP) function, which prevents the output from being unstable and from exceeding the specified maximum voltage. It also includes Under-Voltage Lockout (UVLO) and Thermal Shut Down (TSD) features, which shut down the device if the input voltage is either too low or too high. Finally, it has a slew rate control system that avoids current transconductance, preventing excessive energy and heat dissipation.

LX1555IM represents an optimal solution for today’s demanding mobile applications due to its extended feature sets and high level of integration. It combines low cost, high efficiency, and ease of implementation, allowing OEMs to quickly develop cost-effective energy solutions for their system designs. As such, the LX1555IM is an ideal choice for a variety of switching power management applications.

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